Non-Hermitian Hubbard model without the sign problem

Tomoya Hayata, Arata Yamamoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

We study the Hubbard model with non-Hermitian asymmetric hopping terms. The conjugate hopping terms are introduced for two spin components so that the negative sign is canceled out. This ensures that the quantum Monte Carlo simulation is free from the negative sign problem. We analyze the antiferromagnetic order and its suppression by the non-Hermiticity.

Original languageEnglish
Article number125102
JournalPhysical Review B
Volume104
Issue number12
DOIs
Publication statusPublished - 2021 Sep 15

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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